Check engine light on?

How is a computer going to solve a mechanical rattling noise? When the Check Engine light is on, a diagnostic fault code has been memorized in the Engine Computer. Replacing the computer won't solve the problem. It's doing what it is supposed to do. A new computer will detect the same problem and turn on the Check Engine light again. The code needs to be read which will lead the mechanic to the circuit or system with the problem, not necessarily the specific part.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Lack of power assist is usually caused by a worn power steering pump. The power assist will come back if you raise engine speed a little. The clue is turning in both directions are affected equally. If steering is hard in only one direction, the fix is to replace the rack and pinion steering gear.

An oil leak and a rattle must be visually inspected by a mechanic. There's too many possibilities to make a guess.

caradiodoc

Why does the check engine light come on when I step on the brakes of my 2001 dodge stratus then go off when I step on the gas?

https://www.2carpros.com/articles/service-engine-soon-or-check-engine-light-on-or-flashing

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.

Check for applicable trouble codes. Some of the national brand autostores used to check codes for free.

Stepping on the brake can be a closed throttle issue. The system may be going rich or lean, then corrects itself when you step on the throttle.

Thank you.

Have a good day.

I took my car and pepboys for a free diagnostic check because the engine light go off sometime when i go fast up the hill. And when i stop sometimes the rpm go down and it seen that the car is going to turn off.

This what the code they give me.

p0174 system too lean bank 2
p0154 o2 sensor circuit no activity detected bank 2 sensor 1
p0306 cylinder 6 misfire detected.

Thank you for all you help.

Misfire on cylinder #6 start by checking it for tune up
also check for a vacuum leak that is effecting it
check for exhaust leak and or O2 wiring or no good sensor

My service engine soon light came on and on the way to get the code it went off. Someone told me that even though the light went off i could still get the code pulled because it stores it in the cars memory. Is this true. Thank you.

it is possible, and freeze frame data will tell you what was happening when it set the code.

ok let me run this by you my car has an erratic idle and uses more gas than is should. I got converter checked it was good had the o2 sensors replaced and put fuel injector cleaner in but problem still exsist. I thought i might be map sensor and it's an easy fix, but i dont want to keep spending money when i dont need to any ideas.

to save time and money Autozone will scan it for free, post all codes here. Code should be stored in memory.

engine light came on what could be the problem?

Many possibilities
need to have the codes
cycle ignition key on off on off on
read codes in odometer area

Car will start and then die when it is cold. The problem will sometimes last many days, then it will start fine. It seems to be affected by outside temperatue. When warm the problem does not occur as often. It will stay running with a little foot on the pedal. After warm up, it generally will start again OK. Once warm and sometimes just after a mile or 2 of driving it runs great. What should be checked? The check engine light does not come on. There are 213,000 miles on the car.

Thank you!

[quote:d21fc647c4="billybaru"]Car will start and then die when it is cold. The problem will sometimes last many days, then it will start fine. It seems to be affected by outside temperatue. When warm the problem does not occur as often. It will stay running with a little foot on the pedal. After warm up, it generally will start again OK. Once warm and sometimes just after a mile or 2 of driving it runs great. What should be checked? The check engine light does not come on. There are 213,000 miles on the car.

Thank you![/quote:d21fc647c4]
I had a ford with similar problems that I corrected with a new fuel pump relay under the dashboard.